Question

The K.E. of a body can be increased maximum by doubling its:

• A. mass
• B. weight
• C. speed
• D. density

Answer 1

The correct option is C speed

$K.E=\frac{1}{2}m{v}^2$

$K.E\propto m$ & $K.E\propto v^2$

So doubling mass will double the kinetic energy and doubling speed will make kinetic energy $4$ times.

$\therefore$ The K.E. of a body can be increased maximum by doubling its speed.